Elongated square cupola

Elongated square cupola

Infobox Polyhedron


Polyhedron_Type=Johnson
J18 - J19 - J20
Face_List=4 triangles
1+3.4 squares
1 octagon
Edge_Count=36
Vertex_Count=20
Symmetry_Group="C"4v|
Vertex_List=8(42.8)
4+8(3.43)
Dual=-
Property_List=convex

In geometry, the elongated square cupola is one of the Johnson solids ("J"19). As the name suggests, it can be constructed by elongating a square cupola ("J"4) by attaching an octagonal prism to its base. The solid can be seen as a rhombicuboctahedron with its "lid" (another square cupola) removed.

The 92 Johnson solids were named and described by Norman Johnson in 1966.

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